Blue Hydraulic System Pressure Higher Than Normal

TASK 29-12-00-810-822-A
Blue Hydraulic System Pressure Higher Than Normal

1. Possible Causes

B SYS ACCU PRESS GAGE [2072GM]
HYDR. PRESSURE TRANSMITTER [2065GN]
SDAC-1 [1WV1]
SDAC-2 [1WV2]
wiring and connectors
CASE DRAIN FILT.ELEC.PUMP B [2084GM]
PACKAGE E-PUMP [2075GJ]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 29-10-00-863-003	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-12-43-610-001	Servicing of the Electric-Pump Case-Drain Filter
AMM 29-12-51-000-001	Removal of the Electric Pump
AMM 29-12-51-400-001	Installation of the Electric Pump
ASM 293201
AMM 29-32-11-000-002	Removal of the Hydraulic Pressure Transducer
AMM 29-32-11-400-002	Installation of the Hydraulic Pressure Transducer
ASM 315402
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 29-12-00-700-051-A

A. Test

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

(1) Pressurize the Blue hydraulic system with the electric pump AMM 29-10-00-863-003.
(2) Read the Blue hydraulic system pressure on the ECAM, if pressure is higher than normal go to Para 4.A.1.

4. Fault Isolation
Subtask 29-12-00-810-084-A

A. Procedure
(1) If the test confirms the fault:
(a) Pressurize the Blue hydraulic system with the electric pump AMM 29-10-00-863-003:

If the pressure for the Blue hydraulic system is shown in the normal range on B SYS ACCU PRESS GAGE [2072GM] , go to step (2).
If the pressure for the Blue hydraulic system is shown higher than normal on the B SYS ACCU PRESS GAGE [2072GM] , go to step (6).

(2) If the pressure for the Blue hydraulic system is shown in the normal range:
(a) Replace the HYDR. PRESSURE TRANSMITTER [2065GN] AMM 29-32-11-000-002 and AMM 29-32-11-400-002.
(b) Pressurize the Blue hydraulic system AMM 29-10-00-863-003.

NOTE: You can use a ground supply or the Blue electric pump to pressurize the Blue hydraulic system.

(3) If the fault continues:
(a) Replace SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Pressurize the Blue hydraulic system AMM 29-10-00-863-003.

NOTE: You can use a ground supply or the Blue electric pump to pressurize the Blue hydraulic system.

(4) If the fault continues:
(a) Replace SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Pressurize the Blue hydraulic system AMM 29-10-00-863-003.

NOTE: You can use a ground supply or the Blue electric pump to pressurize the Blue hydraulic system.

(5) If the fault continues:
(a) Do a check and repair the applicable aircraft wiring and connectors ASM 293201 and ASM 315402 from:

The Blue hydraulic pressure transducer (2065GN) to the SDAC1 (1WV1)
The Blue hydraulic pressure transducer (2065GN) to the SDAC2 (1WV2)
The Blue hydraulic pressure transducer (2065GN) to GROUND.

(b) Pressurize the Blue hydraulic system AMM 29-10-00-863-003.

NOTE: You can use a ground supply or the Blue electric pump to pressurize the Blue hydraulic system.

(6) If the pressure for the Blue hydraulic system is shown higher than normal:
(a) Do a check of the filter element CASE DRAIN FILT.ELEC.PUMP B [2084GM] .
1 Replace the filter element as necessary AMM 29-12-43-610-001.
(7) If the fault continues:
(a) Replace the PACKAGE E-PUMP [2075GJ] AMM 29-12-51-000-001 and AMM 29-12-51-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:29:24 UTC